冬瓜皮生物质炭对水中六价铬的吸附性能研究  

Adsorption studies of wax gourd peel biochar for hexavalent chromium in water

作　　者：胡造时 陈冬梅 李丽和 韦江慧 李青倩 黄宁 HU Zaoshi;CHEN Dongmei;LI Lihe;WEI Jianghui;LI Qingqian;HUANG Ning(Guangxi Zhuang Autonomous Region Ecological and Environmental Monitoring Centre,Nanning 530000,China;School of Ecology and Environment,Guangxi Logistics Vocational and Technical College,Guigang 537000,China)

机构地区：[1]广西壮族自治区生态环境监测中心,广西南宁530000 [2]广西物流职业技术学院生态环境学院,广西贵港537000

出　　处：《广西大学学报（自然科学版）》2024年第2期409-416,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：广西重点研发计划项目(桂科AB21196063)。

摘　　要：为了探究冬瓜皮生物质炭对水中六价铬的吸附效果,以期实现废物资源化,为冬瓜皮生物质炭用于金属污染废水的修复提供技术支撑,选用冬瓜皮为原材料,在隔绝氧气的条件下制备生物质炭,并将其用于吸附水中的六价铬,考察了冬瓜皮生物质炭投加量、废水六价铬初始质量浓度、废水pH值、吸附时间、吸附温度对六价铬去除率和吸附容量的影响。结果表明:冬瓜皮生物质炭对六价铬具有良好的去除能力,去除率最高可达100%,吸附过程符合准二级动力学方程,等温吸附过程与Langmuir方程拟合较好。热力学研究分析表明,冬瓜皮生物质炭对六价铬的吸附过程是自发的吸热反应。This study was to explore the adsorption effect of wax gourd peel biochar on hexavalent chromium in water,in order to realize waste resource recovery,and provide technical support for the application of wax gourd peel biochar in the remediation of metal polluted wastewater.The biochar was prepared using wax gourd peel as raw material under the condition of oxygen isolation,then it was used to adsorb hexavalent chromium in water.Effects of quantity of biochar,initial concentration of hexavalent chromium,pH,adsorption time and temperature on the removal rate and adsorption quantity of hexavalent chromium were investigated.The results showed that wax gourd peel biochar had great removal capacity to hexavalent chromium,and the removal rate of hexavalent chromium was up to 100%.The adsorption process was consistent with the second order kinetic equation,and the isothermal adsorption process fits well with the Langmuir equation.Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic.

关 键 词：六价铬 吸附 冬瓜皮 生物质炭 

分 类 号：X703[环境科学与工程—环境工程]